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题型：单选题题类：常考题难易度：普通

定冠词——用于表示单位的名词前

He is paid by ____ hour.

A、the B、/ C、an D、a

举一反三

We have Sports Day and art festival in our school.

He grabbed the knife by blade.

Ben grabbed Peter by sleeve.

The bananas are sold by _____ kilo.

The parking lot charges by ______ hour.

______ paper was invented by Chinese people.

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